- 
inclusion
 - 
Warn about inclusions in element type declarations.
 - 
exclusion
 - 
Warn about exclusions in element type declarations.
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rcdata-content
 - 
Warn about RCDATA declared content in element type declarations.
 - 
cdata-content
 - 
Warn about CDATA declared content in element type declarations.
 - 
ps-comment
 - 
Warn about comments in parameter separators.
 - 
attlist-group-decl
 - 
Warn about name groups in attribute declarations.
 - 
element-group-decl
 - 
Warn about name groups in element type declarations.
 - 
pi-entity
 - 
Warn about PI entities. 
 - 
internal-sdata-entity
 - 
Warn about internal SDATA entities.
 - 
internal-cdata-entity
 - 
Warn about internal CDATA entities.
 - 
external-sdata-entity
 - 
Warn about external SDATA entities.
 - 
external-cdata-entity
 - 
Warn about external CDATA entities.
 - 
bracket-entity
 - 
Warn about bracketed text entities.
 - 
data-atts
 - 
Warn about attribute definition list declarations for notations.
 - 
missing-system-id
 - 
Warn about external identifiers without system identifiers.
 - 
conref
 - 
Warn about content reference attributes.
 - 
current
 - 
Warn about current attributes.
 - 
nutoken-decl-value
 - 
Warn about attributes with a declared value of NUTOKEN or NUTOKENS.
 - 
number-decl-value
 - 
Warn about attributes with a declared value of NUMBER or NUMBERS.
 - 
name-decl-value
 - 
Warn about attributes with a declared value of NAME or NAMES.
 - 
named-char-ref
 - 
Warn about named character references.
 - 
refc
 - 
Warn about ommitted refc delimiters. 
 - 
temp-ms
 - 
Warn about TEMP marked sections.
 - 
rcdata-ms
 - 
Warn about RCDATA marked sections.
 - 
instance-include-ms
 - 
Warn about INCLUDE marked sections in the document instance.
 - 
instance-ignore-ms
 - 
Warn about IGNORE marked sections in the document instance.
 - 
and-group
 - 
Warn about AND connectors in model groups.
 - 
rank
 - 
Warn about ranked elements.
 - 
empty-comment-decl
 - 
Warn about empty comment declarations.
 - 
att-value-not-literal
 - 
Warn about attribute values which are not literals.
 - 
missing-att-name
 - 
Warn about ommitted attribute names in start tags.
 - 
comment-decl-s
 - 
Warn about spaces before the MDC in comment declarations.
 - 
comment-decl-multiple
 - 
Warn about comment declarations containing multiple comments.
 - 
missing-status-keyword
 - 
Warn about marked sections without a status keyword.
 - 
multiple-status-keyword
 - 
Warn about marked sections with multiple status keywords.
 - 
instance-param-entity
 - 
Warn about parameter entities in the document instance.
 - 
min-param
 - 
Warn about minimization parameters in element type declarations. 
 - 
mixed-content-xml
 - 
Warn about cases of mixed content which are not allowed in XML.
 - 
name-group-not-or
 - 
Warn about name groups with a connector different from OR.
 - 
pi-missing-name
 - 
Warn about processing instructions which don't start with a name.
 - 
instance-status-keyword-s
 - 
Warn about spaces between DSO and status keyword in marked sections.
 - 
external-data-entity-ref
 - 
Warn about references to external data entities in the content.
 - 
att-value-external-entity-ref
 - 
Warn about references to external data entities in attribute values.
 - 
data-delim
 - 
Warn about occurances of `<' and `&' as data.
 - 
explicit-sgml-decl
 - 
Warn about an explicit SGML declaration. 
 - 
internal-subset-ms
 - 
Warn about marked sections in the internal subset.
 - 
default-entity
 - 
Warn about a default entity declaration.
 - 
non-sgml-char-ref
 - 
Warn about numeric character references to non-SGML characters.
 - 
internal-subset-ps-param-entity
 - 
Warn about parameter entity references in parameter separators in the 
internal subset.
 - 
internal-subset-ts-param-entity
 - 
Warn about parameter entity references in token separators in the 
internal subset.
 - 
internal-subset-literal-param-entity
 - 
Warn about parameter entity references in parameter literals in the 
internal subset.